The 0.4mm Large MK8 Nozzle for 1.75mm filament is a 3D Printing Nozzle that has a larger size than most, but offers a thin output diameter for high resolution printing. This is ideal for very small or extremely detailed prints, even if the prints typically take longer than nozzles ranging from 0.5mm and upwards. It is designed to work with extruders with M6 thread, and was originally designed for the ever-famous Makerbot 3D Printers as a replacement part or as an upgrade.
If you are experienced in 3D Printing and are looking for a new nozzle to print small and detailed objects at a relatively fast rate, this nozzle will certainly do the job. And while larger nozzles focus on printing speed at the cost of printing quality, the small 0.2mm nozzles focus solely on quality at the cost of speed, with nozzles ranging between 0.3mm and 0.5mm offering a great balance between good speeds and reasonably precise accuracy.